Every source I found online says a full installation of Cygwin takes over 1 GB, but mine is only 100 MB. I was pretty sure I downloaded everything from the mirror
gcc-core:GNU Compiler collection(C Open MP)
gcc-fortran:GNU Compiler collection(Fortran)
gcc-g++:GNU Compiler collection(C++)
gcc-objc:GNU Compiler collection(Objective-C)
gdb: The GNU Debugger
make: The GNU version of the "make" utility